You can use @upstash/redis in Cloudflare Workers as it accesses the Redis using REST calls.

Workers requires wrangler, a tool to deploy your function. Run the following command:

npm install -g @cloudflare/wrangler

Create your wrangler project:

wrangler generate workers-with-redis

You’ll notice your project structure should now look something like:

  ├── wrangler.toml
  ├── index.js
  ├── package.json

Install the @upstash/redis

cd workers-with-redis
npm install @upstash/redis

Create a database in Upstash Console. Global database is recommended for Cloudflare Workers as it provides better global latency.

Copy following variable from Upstash console and paste them to wrangler.toml

# wrangler.toml
[vars]
UPSTASH_REDIS_REST_URL = ""
UPSTASH_REDIS_REST_TOKEN = ""

Update type to webpack

type = "webpack"

Edit index.js

// index.js
import { auth, incr } from '@upstash/redis';

auth(UPSTASH_REDIS_REST_URL, UPSTASH_REDIS_REST_TOKEN);

addEventListener('fetch', (event) => {
  event.respondWith(handleRequest(event.request));
});

async function handleRequest(request) {
  const url = new URL(request.url);

  if (url.pathname !== '/') {
    return new Response();
  }

  const { data: count } = await incr('workers-count');

  return new Response(html(count), {
    headers: {
      'content-type': 'text/html;charset=UTF-8',
    },
  });
}

const html = (count) => `
  <h1>Cloudflare Workers with Upstash Redis</h1>
  <h2>Count: ${count}</h2>
`;

To authenticate into your Cloudflare account and copy account_id

Follow the Quick Start for steps on gathering the correct account ID and API token to link wrangler to your Cloudflare account.

# wrangler.toml
account_id = "a123..."

Test your worker locally

wrangler dev

Build your worker

wrangler build

Deploy your worker

wrangler publish